Honestly I'm not sure if it was the case. Most of the time we saw her in the saturated red moonlight and after that it was twilight where she had a different tone, but I can't tell if it was indeed due to her feather changing or due to light changing (or both and she turned more pale green). We'll have to wait few months till season 2.

Also I just realized that Magica seem to have taken fashion advice from Maleficent X3>